Thaw dough on a baking sheet sprayed with cooking spray. Let raise according to directions on package. When it has doubled in size, brown sausage over medium high heat. Once sausage has started browning, add mushrooms, stirring occasionally. When mushrooms are soft and sausage is brown, drain. Turn heat to low and add cream cheese stirring until it has melted and coats everything evenly.
Roll dough into a large rectangle, over a floured surface. Spread with cream cheese sausage mixture. Starting with one of the long sides, roll into a long loaf. Fold ends over, press seams to seal, and place back on baking sheet. Bake at 375 for 20-25 minutes or just until it starts to brown. Open the end of a cube of butter and gently rub across the top of the Stromboli. Place back in over for just a few minutes just to finish browning. Remove from oven, cool slightly, and slice to sere. Enjoy!